Of seven produce groups, only one protected the brain

A new study of 222,000 people narrowed it down to a single winner.

This email was sent

July 21, 2026 10:00am EDT

Is this your brand on Milled? Claim it.

Matte tone:

New Research · On Leafy Greens & the Brain

Of Seven Produce Groups, Only One Protected the Brain

Dear friend,

Every so often, a study arrives that says plainly what I have been telling patients for forty years. This month, one did.

Researchers pooled data on more than 222,000 people, published in The American Journal of Clinical Nutrition. They found that those eating the most fruits and vegetables had roughly a 20% lower risk of developing dementia than those eating the least.

That alone would be worth your attention. But it's what happened next that I want you to see.

The researchers broke produce down into seven groups — cruciferous vegetables, berries, citrus, and others. Then they asked which ones, on their own, were significantly tied to a lower risk of dementia.

18%

Only green leafy vegetables stood alone. Each additional daily serving was tied to roughly an 18% lower risk of dementia.
— Pooled analysis of 222,000+ adults, Neurology, 2026

Why Greens Stand Apart

The Most Nutrient-Dense Food on Earth Per calorie, leafy greens deliver more nutrition than any other food — the very top of the nutrient-density scale. Vitamin K, folate, lutein, natural nitrates, and a wealth of phytochemicals, all for almost no caloric cost. This is nutrient density in its purest form.

They Protect the Blood Vessels That Feed the Brain The natural nitrates in greens support healthy blood flow and vascular function — and the brain is an organ exquisitely dependent on its blood supply. Reduced oxidative stress, better circulation, less inflammation. The mechanisms are not mysterious.

The Source Matters More Than the Compound Here is the detail I never want you to forget. A companion study found that nitrate from leafy greens lowered dementia risk — while nitrate from red and processed meat raised it. Same molecule. Opposite effect. It is never about one compound in isolation. It is about the food it comes in.

For decades, I've taught a simple idea: the health of your body — and, it turns out, your brain — is determined by the nutrient density of what you eat. Health equals nutrients divided by calories. Nothing embodies that equation more perfectly than a leaf of kale, a handful of spinach, a bowl of watercress.

This is why greens lead the way in the Nutritarian diet-style. Not fruit. Not grains. Not even the other vegetables. Greens first — because gram for gram, nothing else comes close.

And the beautiful part is how little it asks of you. One serving a day moved the needle in this research. One serving. There is no supplement, no medication, no protocol that offers a return like that for so small an effort.

A "Serving" Is Easier to Reach Than You Think

Spinach

Kale

Swiss chard

Collard greens

Arugula

Watercress

Explore Nutritarian Recipes With Greens →

From hearty salads to blended greens — simple ways to reach your serving a day.

"Of everything on your plate, greens ask the least and give the most. The science keeps arriving at the same conclusion I did decades ago."

— Joel Fuhrman, MD

To your health,

Dr. Fuhrman

YouTube Facebook Instagram

Dr. Fuhrman · 8 Bartles Corner Road, Suite 106, Flemington, NJ 08822

Unsubscribe

You received this email from Dr. Fuhrman.
If you would like to unsubscribe, click here.

Of seven produce groups, only one protected the brain

A new study of 222,000 people narrowed it down to a single winner.

Of Seven Produce Groups, Only One Protected the Brain

Recent emails from Dr. Fuhrman